Boiler furnace



Oct. 29, 1929. J. VAN BRUNT BOILER mamas Filed Nov. 1925 2 Shets-Shet 11111 111 1 1 I 1 |1|14W101/11////flfl/111/1H1111111 1111/11h/11/1/111/1/111h111101111111011 1 /1 1 1 111 1 11 1 111111 111 11 11 111 11 1 1 11111111 1 1111111 1111 1 111 1111 11 11 1 1 11111111/111111/101/n11111w4 1 111 3%?29 11 1 1 1 1 /111 111/111 1111 11- 1unm 1 11 411 11111 1 1 Oct. 29, 1929. J, VAN QT 1,733,474

BOILER FURNACE Filed NOV. 3, 1925 2 Sheets-Sheet 2 I3 I] I II Patenteda. 29, 192 9 JUNITED STATES PATENT OFFICE JOHN VAN BRUNT, OI FLUSHIN G,NEW YORK, ASSIGNOR TO INTERNATIONAL COMBUS- 'lION ENGINEERINGCORPORATION, A CORPORATION OF DELAWARE BOILER FURNACE Application filedNovember 3, 1925. Serial No. 66,437.

This invention relates to boiler furnaces and particularly such as areintended to burn finely divided fuel, as for example, pulver ized coal.

One of the primary objects of the invention is to provide a boilerfurnace which is compact and simple inconstruction and in which a largequantity of steam can be evaporated with an amount of evaporating areaconsiderably less than now required to produce the same quantit ofsteam.

Another'object of t e invention has to do with the provision ofimprovements in the connection of various portions of the boiler.Further objects of the invention will appear in connection with theaccompanying description of the best form ofmy invention now known tome, when taken in connection with the accompanying drawings, whereinnace embodying my improvements,

Fig. 2 is a portion vertical section and end elevation of the boilerfurnace of Fig. 1, and Fig. 3 is a fragmentary plan section taken on theline 33 of Fig. '1.

Referring now to the drawings, the reference character A denotes thecombustion space of the boiler furnace, this combustion space beingprimarily defined by evaporating elements. The two side walls of thecombustion chamber are provided with water walls B composed of aplurality of vertically extendingtubes and the front wall isin partformed by such a water wall. C. The roof of similar water wall D, and awater screen E defines the lower portion of the combustion space of thefurnace. The rear of the combustion space is defined by the banks oftubes F.

The tubes 7 in part constituting the water the lower drum 12 of theboiler.

Fig. 1 is a cross section thru a boiler furthe furnace is also composedin part by a water wall and the top water wall areipro- A relativelylight sheathing 13 is carried on the tubes 11 of the water wall D, and'beneath the water screen. E is the ash pit G, which is adapted toreceive the refuse particles precipitating out of the fuel and flamestream and passing thru the screenE, which screen serves the function,among other "things, of coolingsuch precipitating ash below slag formingtemperature. v

The tubes 14, of which the side water walls. E are in part formed,extend straight up thru the roof for connection into headers 15 and thelower'ends of such tubes 14 are bent so as to pass outwardly forconnection into the headers 16. The headers 16, which incline upwardlyfrom'front to rear, are connected to the drum 12 by a plurality of pipes17 each of which is somewhat bent. These connections 17 take 011' fromthe header 16 .at a plurality of spaced points lengthwise thereof. Aplurality of connections 18 lead from the headers 15 to the drum 9, suchconnections also taking off from'the headers at a plurality of spacedpoints. The headers 15 are suspended from the structural work 19 bymeans of suspension rods 20 and the steam drum 21-which'is connected tothe drum 9is also'suspended. The tubes of the front wall C are suspendedfrom the header 8, which header is in turn suspended b means of thesuspension rods 22 (see Fig. 2 The header 8 being suspended and the drum9 being fixed,

vided withlongitudinally extending fins 23, which fins are preferablywelded tothe tubes,

' the tubes and the fins co-operating to constitute the water wall. Thefins on the tubes 7 of the front water wall are interrupted at points toprovide air inlet openings 24 leading from-the channels 25- formed bysuch water wall, the sheathing 26 and the divisions 27 Air enters eachof the horizontal compartments 25 thru the damper controlled inlets 28.(See Figs. 1 and 3). And in traversing the space within the front wall,the

air becomes heated.

The frontrow, the middle row of tubes and completed before the passes ofthe vertical bank of tubes are reached. This turbulent combustion withits comparatively intense tempearture is preferred for the reason thatthe combustion space is defined on six sides by tubes subjected toradiant heat. These tubes, therefore, absorb heat at very high rate, sohigh in fact that in the absence of turbulent combustion with itsconcomitant high temperature, the temperature within the combustionspace would be so lowered that smoking, ineificiency and otherdraw-backs would result. Atthe same time, by virtue of the high rate ofabsorption of the tubes,

' ,the boiler can be cut down in size, as can the combustion space byvirtue of the turbulent combustion and short flame, whereby the size ofthe boiler and the size of the combustion space is but a small fractionof the size required to produce the same amount of steam according tostandard practice. This also means that the drums 9' and 12 can be 10-cated closer together. Thus the ground area and the vertical heightoccupied is very ma,-

terially reduced, added to which the arrangement of the various elementsor units constituting the boilerfurnace is much simplified.

What I'claim is:

1. In a boiler of the radiant heat type defining its own combustionspace, the combination of an upper and a lower drum at the rear of theboiler, a bank comprising a multiplicity of tubes connecting said drums,side water walls in' advance of said bank and each comprising arow ofupright tubes having headers at their upper and lower ends, a frontwater wall comprising a row of upright tubes having headers at theirupper and lower ends, a roof water wall comprisinga row of tubesconnected at one end to the upper drum 2. In a boiler of the radiantheat type de fining its own combustion space, the combination of anupper and a lower drum at the rear of the boiler, a bank comprising amul-.

tiplicity of tubes connecting said drums, side water walls in advance ofsaid bank and each comprising a row of upright tubes having headers attheir upper and lower ends, a front water wall comprising a row ofupright tubes having headers at their upper and lower ends, a roof Waterwall comprising a row of tubes connected at one end to the upper drumand at the other end to the upper header of the front water wall,enclosing sheathing for the boiler including a roof shell carried on theroof water wall, structural work, and means for suspending the front andside walls from said structural work.

In testimony whereof, I have hereunto signed my name.

' JOHN VAN BRUNT.

and at the other end to the upper header of the front water wall, a rowof spaced tubes defining the bottom of the combustion space connected atone end to the lower drum and 'at the other end to the lower header ofthe front water wall, enclosing sheathing for the boiler providing anash pit and an oiftake, the headers for the side and front walls beingexterior of said sheathing, structural work, and means whereby saidupper headers are suspended therefrom, together with me as for admittingfuel to be burned in space in the combustion space defined by theboiler. v

